{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Menstrual+Cycles&page=2",
    "query": {
      "condition": "Menstrual Cycles",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Menstrual+Cycles&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-06-26T19:00:12.211Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT00128726",
      "title": "The Effects of Continuous Administration of a Monophasic Oral Contraceptive on Bleeding Days and Endometrial and Ovarian Function",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Menstrual Cycle",
        "Healthy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Milton S. Hershey Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 62,
      "start_date": "2001-06",
      "completion_date": "2006-08",
      "has_results": false,
      "last_update_posted_date": "2012-12-21",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Hershey, Pennsylvania",
      "locations": [
        {
          "city": "Hershey",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00128726"
    },
    {
      "nct_id": "NCT00041899",
      "title": "Comparison of Blood Levels of Two Formulations of the Selective Hormone Receptor Modulator CDB-2914",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "CDB-2914",
          "type": "DRUG"
        },
        {
          "name": "COB-2914",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "Female only"
      },
      "enrollment_count": 15,
      "start_date": "2002-05",
      "completion_date": "2005-03",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00041899"
    },
    {
      "nct_id": "NCT07326722",
      "title": "Delivering tAN to Reduce HMB: The LUNA Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heavy Menstrual Bleeding"
      ],
      "interventions": [
        {
          "name": "Sparrow Link",
          "type": "DEVICE"
        },
        {
          "name": "Sparrow Link (Sham)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Spark Biomedical, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "45 Years",
        "sex": "FEMALE",
        "summary": "14 Years to 45 Years · Female only"
      },
      "enrollment_count": 80,
      "start_date": "2026-03-06",
      "completion_date": "2027-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-02",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07326722"
    },
    {
      "nct_id": "NCT01304940",
      "title": "Women's Post Traumatic Stress Disorder (PTSD) Research Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Posttraumatic Stress Disorder"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "VA Office of Research and Development",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 55 Years · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2008-12-01",
      "completion_date": "2013-02-01",
      "has_results": true,
      "last_update_posted_date": "2024-06-11",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01304940"
    },
    {
      "nct_id": "NCT01190150",
      "title": "Lysteda Pediatric Research Equity Act (PREA) Pharmacokinetic Study in Adolescent Females With Heavy Menstrual Bleeding",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Menorrhagia"
      ],
      "interventions": [
        {
          "name": "tranexamic acid",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ferring Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "16 Years",
        "sex": "FEMALE",
        "summary": "12 Years to 16 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2010-08",
      "completion_date": "2011-04",
      "has_results": true,
      "last_update_posted_date": "2012-07-16",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Cypress, California",
      "locations": [
        {
          "city": "Cypress",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01190150"
    },
    {
      "nct_id": "NCT05050916",
      "title": "The Investigation of Vitamin D and Menstrual Cycles Trial, the inVitD Trial: A Phase II Clinical Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Reproductive Issues"
      ],
      "interventions": [
        {
          "name": "Vitamin D",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "National Institute of Environmental Health Sciences (NIEHS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "19 Years to 40 Years · Female only"
      },
      "enrollment_count": 998,
      "start_date": "2023-03-17",
      "completion_date": "2024-06-27",
      "has_results": false,
      "last_update_posted_date": "2026-06-15",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 2,
      "location_summary": "Detroit, Michigan • Research Triangle Park, North Carolina",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Research Triangle Park",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05050916"
    },
    {
      "nct_id": "NCT00161681",
      "title": "Study Evaluating Levonorgestrel/Ethinyl Estradiol (LNG/EE) in PMS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Premenstrual Syndrome"
      ],
      "interventions": [
        {
          "name": "Levonorgestrel/Ethinyl Estradiol",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wyeth is now a wholly owned subsidiary of Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 49 Years · Female only"
      },
      "enrollment_count": 200,
      "start_date": "2005-07",
      "completion_date": "2006-08",
      "has_results": false,
      "last_update_posted_date": "2013-02-08",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 48,
      "location_summary": "Huntsville, Alabama • Peoria, Arizona • Phoenix, Arizona + 40 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Peoria",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00161681"
    },
    {
      "nct_id": "NCT01788215",
      "title": "Effect of a Commonly Used Antibiotic, Doxycycline, in Women With Polycystic Ovarian Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Polycystic Ovarian Syndrome (PCOS)",
        "Irregular Menstrual Cycles",
        "Androgen Excess"
      ],
      "interventions": [
        {
          "name": "doxycycline",
          "type": "DRUG"
        },
        {
          "name": "Sugar Pill",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Rochester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 40 Years · Female only"
      },
      "enrollment_count": 10,
      "start_date": "2010-11",
      "completion_date": "2014-09",
      "has_results": true,
      "last_update_posted_date": "2016-01-13",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Rochester, New York",
      "locations": [
        {
          "city": "Rochester",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01788215"
    },
    {
      "nct_id": "NCT00006425",
      "title": "Breast Imaging Studies in Women at High Genetic Risk of Breast Cancer: Menstrual Cycle Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Breast Cancer"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 100 Years · Female only"
      },
      "enrollment_count": 20,
      "start_date": "2000-12-19",
      "completion_date": "2008-10-03",
      "has_results": false,
      "last_update_posted_date": "2020-11-27",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006425"
    },
    {
      "nct_id": "NCT00594217",
      "title": "Determining How Quickly Progesterone Slows LH Pulse Frequency",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Normal",
        "PCOS"
      ],
      "interventions": [
        {
          "name": "oral micronized progesterone suspension",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 35 Years · Female only"
      },
      "enrollment_count": 85,
      "start_date": "2007-11-29",
      "completion_date": "2020-01-18",
      "has_results": true,
      "last_update_posted_date": "2025-03-28",
      "last_synced_at": "2026-06-26T19:00:12.211Z",
      "location_count": 1,
      "location_summary": "Charlottesville, Virginia",
      "locations": [
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00594217"
    }
  ]
}